Liza recently participated in a post-Roberts-ad conference call with NARAL and has provided the details here and here. Her coverage of the call and analysis of the larger strategy issues are excellent. If you were frustrated even a little by the Roberts ad, you'll enjoy this diary.
The discussion here is the one I've been following most of the day, but it's recently been front-paged here, so I hope for some of the "heavy hitters" to weigh in as the night goes by.
Put the kids to bed, turn off the TV. There's a lot of detail here, but it needs to be part of everyone's arsenal if you intend to stay involved in the issue.